![]() ![]() When the plug is inserted into the base the load is connected to the CT. The base has a pressure plate terminal and the plug has a pin, which is crimped onto the wire. These shorting blocks consist of a base element to which the current transformer is wired and a plug element to which the load wired. The WEC-100 series of shorting blocks as supplied by Langford & Associates are assembled from Entrelec components and mounted on a standard DIN rail. If current transformers are operated open circuited, extremely high voltages can be generated with resultant damage to equipment and personnel.Ĭonsequently, before removing a load such as a meter or relay the CT should be short circuited.Īn easy, efficient and convenient method of doing shorting CTs is through the use of a shorting terminal block which automatically short circuits the instrument transformer when the load is removed.
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